Notes: Tons per capita is calculated with BTS methodology based on data from the Freight Analysis Framework. The 2010 data are provisional estimates, which are based on selected modal and economic trend data. Data based on the National Household Travel Survey presented here use the source frame population estimate, which does not include persons under 5 years of age.

Sources: Passenger—U.S. Department of Transportation, Federal Highway Administration, 2009 National Household Travel Survey, available at http://nhts.ornl.gov/ accessed October 2012. Freight—U.S. Department of Transportation, Federal Highway Administration, Freight Analysis Framework, version 3.3, available at http://faf.ornl.gov/ accessed October 2012. Population—U.S. Department of Commerce, U.S. Census Bureau, Population Division, Annual Population Estimates, December 2009, available at http://www.census.gov/popest/estbygeo.html accessed October 2012.